We’ve long known that a planet’s orbital period and tilt determine length and intensity of seasons. We now see rotation rate matters too: max temperature shifts poleward as rotation slows.
Models show that several puzzling features about Ceres’ topography, gravity anomalies, and crater size distribution may be explained by asymmetric hemispherical convection due to radiogenic heating.
Meteorite isotopes, meteorite paleomagnetics, and planet formation models collectively show Jupiter formation via first slow then fast collection of material by core accretion in <5 million years.
While some Earth-like worlds can generate significant O2 only by biology, “waterworlds” and “desert worlds” can build up O2 even without life because of chemical changes from atmosphere loss to space.
Featuring high-impact papers and a streamlined process, AGU’s new journal is ready to launch.
A new special issue of JGR: Planets presents findings on sand motion, morphology, and mineralogy from the Curiosity rover’s traverse of the active Bagnold dune field in Gale crater.
The Eighth International Conference on Mars;
Pasadena, California, 14–18 July 2014